Black sponge? REEF2REEF Saltwater and Reef Aquarium Forum

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Black sponge REEF2REEF Saltwater and Reef Aquarium Forum

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Black Sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Guess that sea star! REEF2REEF Saltwater and Reef Aquarium Forum

Sponge ID? REEF2REEF Saltwater and Reef Aquarium Forum

Black sponge REEF2REEF Saltwater and Reef Aquarium Forum

Sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Black sponge and encrusting organism?

Is this a black sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Black stuff of my live rocks—I want it to go away!

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What is this? Perhaps sponge? REEF2REEF Saltwater and Reef